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熱處理對n-SiO2／Ni鍍層接觸疲勞性能的影響
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TG174.441

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國家自然科學(xué)基金（50604020）：國家自然科學(xué)基金重點(diǎn)項(xiàng)目（50235030）


Effect of Heat Treatment on Contact Fatigue Properties of n-SiO2/Ni Composite Coating Prepared by Electro-Brush Plating
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    摘要:

    用電刷鍍技術(shù)制備了n-SiO2／Ni復(fù)合刷鍍層，分析了復(fù)合鍍層的微觀組織，測試了該鍍層的接觸疲勞性能，考察了熱處理對組織和接觸疲勞性能的影響，并與純鎳鍍層進(jìn)行了對比。結(jié)果表明，復(fù)合鍍層的組織細(xì)小，納米顆粒呈彌散分布；熱處理后n-SiO2／Ni的接觸疲勞壽命超過130萬次，是熱處理后純鎳鍍層的4．67倍，與鍍態(tài)n-SiO2／Ni的接觸疲勞性能相當(dāng)。熱處理后n-SiO2／Ni鍍層的疲勞斷口呈塑性變形特征，熱處理能在一定程度上改善復(fù)合鍍層在接觸疲勞過程中的塑性變形能力。

    Abstract:

    The comparative study of contact fatigue properties between the n-SiO2/Ni coating and the nickel coating prepared by electro-brush plating was carried out by means of microstructure characterization and taking account of effect of heat treatment on it. Results showed that the microstructure of n-SiO2/Ni composite coating was finer and the distribution of nano-particles incorporated in the nickel matrix was uniformly dispersive. The contact fatigue life of the heat-treated n-SiO2/Ni coating was over 1.3 million cycles, and 4.67 times that of the nickel coating, and almost equivalent to that of the as-deposited n-SiO2/Ni coating. The fracture zones of the heat-treated n-SiO2/Ni coating exhibited the feature of plastic deformation. The heat treatment can improve the ability of plastic deformation during the contact fatigue processes.

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蔣斌 徐濱士 董世運(yùn) 丁培道.熱處理對n-SiO2／Ni鍍層接觸疲勞性能的影響[J].稀有金屬材料與工程,2007,36(10):1728~1731.[Jiang Bin, Xu Binshi, Dong Shiyun, Ding Peidao. Effect of Heat Treatment on Contact Fatigue Properties of n-SiO2/Ni Composite Coating Prepared by Electro-Brush Plating[J]. Rare Metal Materials and Engineering,2007,36(10):1728~1731.]
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  • 最后修改日期:2006-11-21
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